Filename: 000-index.txt
Title: Index of Tor Proposals
Author: Nick Mathewson
Created: 26-Jan-2007
Status: Meta

Overview:

   This document provides an index to Tor proposals.

   This is an informational document.

   Everything in this document below the line of '=' signs is automatically
   generated by reindex.py; do not edit by hand.

============================================================
Proposals by number:

000  Index of Tor Proposals [META]
001  The Tor Proposal Process [META]
098  Proposals that should be written [META]
099  Miscellaneous proposals [META]
100  Tor Unreliable Datagram Extension Proposal [DEAD]
101  Voting on the Tor Directory System [CLOSED]
102  Dropping "opt" from the directory format [CLOSED]
103  Splitting identity key from regularly used signing key [CLOSED]
104  Long and Short Router Descriptors [CLOSED]
105  Version negotiation for the Tor protocol [CLOSED]
106  Checking fewer things during TLS handshakes [CLOSED]
107  Uptime Sanity Checking [CLOSED]
108  Base "Stable" Flag on Mean Time Between Failures [CLOSED]
109  No more than one server per IP address [CLOSED]
110  Avoiding infinite length circuits [CLOSED]
111  Prioritizing local traffic over relayed traffic [CLOSED]
112  Bring Back Pathlen Coin Weight [SUPERSEDED]
113  Simplifying directory authority administration [SUPERSEDED]
114  Distributed Storage for Tor Hidden Service Descriptors [CLOSED]
115  Two Hop Paths [DEAD]
116  Two hop paths from entry guards [DEAD]
117  IPv6 exits [CLOSED]
118  Advertising multiple ORPorts at once [SUPERSEDED]
119  New PROTOCOLINFO command for controllers [CLOSED]
120  Shutdown descriptors when Tor servers stop [DEAD]
121  Hidden Service Authentication [CLOSED]
122  Network status entries need a new Unnamed flag [CLOSED]
123  Naming authorities automatically create bindings [CLOSED]
124  Blocking resistant TLS certificate usage [SUPERSEDED]
125  Behavior for bridge users, bridge relays, and bridge authorities [CLOSED]
126  Getting GeoIP data and publishing usage summaries [CLOSED]
127  Relaying dirport requests to Tor download site / website [OBSOLETE]
128  Families of private bridges [DEAD]
129  Block Insecure Protocols by Default [CLOSED]
130  Version 2 Tor connection protocol [CLOSED]
131  Help users to verify they are using Tor [OBSOLETE]
132  A Tor Web Service For Verifying Correct Browser Configuration [OBSOLETE]
133  Incorporate Unreachable ORs into the Tor Network [RESERVE]
134  More robust consensus voting with diverse authority sets [REJECTED]
135  Simplify Configuration of Private Tor Networks [CLOSED]
136  Mass authority migration with legacy keys [CLOSED]
137  Keep controllers informed as Tor bootstraps [CLOSED]
138  Remove routers that are not Running from consensus documents [CLOSED]
139  Download consensus documents only when it will be trusted [CLOSED]
140  Provide diffs between consensuses [CLOSED]
141  Download server descriptors on demand [OBSOLETE]
142  Combine Introduction and Rendezvous Points [DEAD]
143  Improvements of Distributed Storage for Tor Hidden Service Descriptors [SUPERSEDED]
144  Increase the diversity of circuits by detecting nodes belonging the same provider [OBSOLETE]
145  Separate "suitable as a guard" from "suitable as a new guard" [SUPERSEDED]
146  Add new flag to reflect long-term stability [SUPERSEDED]
147  Eliminate the need for v2 directories in generating v3 directories [REJECTED]
148  Stream end reasons from the client side should be uniform [CLOSED]
149  Using data from NETINFO cells [SUPERSEDED]
150  Exclude Exit Nodes from a circuit [CLOSED]
151  Improving Tor Path Selection [CLOSED]
152  Optionally allow exit from single-hop circuits [CLOSED]
153  Automatic software update protocol [SUPERSEDED]
154  Automatic Software Update Protocol [SUPERSEDED]
155  Four Improvements of Hidden Service Performance [CLOSED]
156  Tracking blocked ports on the client side [SUPERSEDED]
157  Make certificate downloads specific [CLOSED]
158  Clients download consensus + microdescriptors [CLOSED]
159  Exit Scanning [INFORMATIONAL]
160  Authorities vote for bandwidth offsets in consensus [FINISHED]
161  Computing Bandwidth Adjustments [CLOSED]
162  Publish the consensus in multiple flavors [CLOSED]
163  Detecting whether a connection comes from a client [SUPERSEDED]
164  Reporting the status of server votes [OBSOLETE]
165  Easy migration for voting authority sets [REJECTED]
166  Including Network Statistics in Extra-Info Documents [CLOSED]
167  Vote on network parameters in consensus [CLOSED]
168  Reduce default circuit window [REJECTED]
169  Eliminate TLS renegotiation for the Tor connection handshake [SUPERSEDED]
170  Configuration options regarding circuit building [SUPERSEDED]
171  Separate streams across circuits by connection metadata [CLOSED]
172  GETINFO controller option for circuit information [RESERVE]
173  GETINFO Option Expansion [OBSOLETE]
174  Optimistic Data for Tor: Server Side [CLOSED]
175  Automatically promoting Tor clients to nodes [REJECTED]
176  Proposed version-3 link handshake for Tor [CLOSED]
177  Abstaining from votes on individual flags [RESERVE]
178  Require majority of authorities to vote for consensus parameters [CLOSED]
179  TLS certificate and parameter normalization [CLOSED]
180  Pluggable transports for circumvention [CLOSED]
181  Optimistic Data for Tor: Client Side [CLOSED]
182  Credit Bucket [OBSOLETE]
183  Refill Intervals [CLOSED]
184  Miscellaneous changes for a v3 Tor link protocol [CLOSED]
185  Directory caches without DirPort [SUPERSEDED]
186  Multiple addresses for one OR or bridge [CLOSED]
187  Reserve a cell type to allow client authorization [CLOSED]
188  Bridge Guards and other anti-enumeration defenses [ACCEPTED]
189  AUTHORIZE and AUTHORIZED cells [OBSOLETE]
190  Bridge Client Authorization Based on a Shared Secret [OBSOLETE]
191  Bridge Detection Resistance against MITM-capable Adversaries [OBSOLETE]
192  Automatically retrieve and store information about bridges [OBSOLETE]
193  Safe cookie authentication for Tor controllers [CLOSED]
194  Mnemonic .onion URLs [SUPERSEDED]
195  TLS certificate normalization for Tor 0.2.4.x [DEAD]
196  Extended ORPort and TransportControlPort [FINISHED]
197  Message-based Inter-Controller IPC Channel [REJECTED]
198  Restore semantics of TLS ClientHello [CLOSED]
199  Integration of BridgeFinder and BridgeFinderHelper [OBSOLETE]
200  Adding new, extensible CREATE, EXTEND, and related cells [CLOSED]
201  Make bridges report statistics on daily v3 network status requests [OPEN]
202  Two improved relay encryption protocols for Tor cells [META]
203  Avoiding censorship by impersonating an HTTPS server [OBSOLETE]
204  Subdomain support for Hidden Service addresses [CLOSED]
205  Remove global client-side DNS caching [CLOSED]
206  Preconfigured directory sources for bootstrapping [CLOSED]
207  Directory guards [CLOSED]
208  IPv6 Exits Redux [CLOSED]
209  Tuning the Parameters for the Path Bias Defense [OBSOLETE]
210  Faster Headless Consensus Bootstrapping [SUPERSEDED]
211  Internal Mapaddress for Tor Configuration Testing [RESERVE]
212  Increase Acceptable Consensus Age [NEEDS-REVISION]
213  Remove stream-level sendmes from the design [DEAD]
214  Allow 4-byte circuit IDs in a new link protocol [CLOSED]
215  Let the minimum consensus method change with time [CLOSED]
216  Improved circuit-creation key exchange [CLOSED]
217  Tor Extended ORPort Authentication [FINISHED]
218  Controller events to better understand connection/circuit usage [CLOSED]
219  Support for full DNS and DNSSEC resolution in Tor [NEEDS-REVISION]
220  Migrate server identity keys to Ed25519 [CLOSED]
221  Stop using CREATE_FAST [CLOSED]
222  Stop sending client timestamps [CLOSED]
223  Ace: Improved circuit-creation key exchange [RESERVE]
224  Next-Generation Hidden Services in Tor [CLOSED]
225  Strawman proposal: commit-and-reveal shared rng [SUPERSEDED]
226  "Scalability and Stability Improvements to BridgeDB: Switching to a Distributed Database System and RDBMS" [RESERVE]
227  Include package fingerprints in consensus documents [CLOSED]
228  Cross-certifying identity keys with onion keys [CLOSED]
229  Further SOCKS5 extensions [REJECTED]
230  How to change RSA1024 relay identity keys [OBSOLETE]
231  Migrating authority RSA1024 identity keys [OBSOLETE]
232  Pluggable Transport through SOCKS proxy [FINISHED]
233  Making Tor2Web mode faster [REJECTED]
234  Adding remittance field to directory specification [REJECTED]
235  Stop assigning (and eventually supporting) the Named flag [CLOSED]
236  The move to a single guard node [CLOSED]
237  All relays are directory servers [CLOSED]
238  Better hidden service stats from Tor relays [CLOSED]
239  Consensus Hash Chaining [OPEN]
240  Early signing key revocation for directory authorities [DRAFT]
241  Resisting guard-turnover attacks [REJECTED]
242  Better performance and usability for the MyFamily option [RESERVE]
243  Give out HSDir flag only to relays with Stable flag [CLOSED]
244  Use RFC5705 Key Exporting in our AUTHENTICATE calls [CLOSED]
245  Deprecating and removing the TAP circuit extension protocol [NEEDS-REVISION]
246  Merging Hidden Service Directories and Introduction Points [REJECTED]
247  Defending Against Guard Discovery Attacks using Vanguards [SUPERSEDED]
248  Remove all RSA identity keys [NEEDS-REVISION]
249  Allow CREATE cells with >505 bytes of handshake data [ACCEPTED]
250  Random Number Generation During Tor Voting [CLOSED]
251  Padding for netflow record resolution reduction [CLOSED]
252  Single Onion Services [SUPERSEDED]
253  Out of Band Circuit HMACs [DEAD]
254  Padding Negotiation [NEEDS-REVISION]
255  Controller features to allow for load-balancing hidden services [RESERVE]
256  Key revocation for relays and authorities [RESERVE]
257  Refactoring authorities and making them more isolated from the net [META]
258  Denial-of-service resistance for directory authorities [DEAD]
259  New Guard Selection Behaviour [OBSOLETE]
260  Rendezvous Single Onion Services [FINISHED]
261  AEZ for relay cryptography [OBSOLETE]
262  Re-keying live circuits with new cryptographic material [OPEN]
263  Request to change key exchange protocol for handshake v1.2 [OBSOLETE]
264  Putting version numbers on the Tor subprotocols [CLOSED]
265  Load Balancing with Overhead Parameters [ACCEPTED]
266  Removing current obsolete clients from the Tor network [SUPERSEDED]
267  Tor Consensus Transparency [OPEN]
268  New Guard Selection Behaviour [OBSOLETE]
269  Transitionally secure hybrid handshakes [NEEDS-REVISION]
270  RebelAlliance: A Post-Quantum Secure Hybrid Handshake Based on NewHope [OBSOLETE]
271  Another algorithm for guard selection [CLOSED]
272  Listed routers should be Valid, Running, and treated as such [CLOSED]
273  Exit relay pinning for web services [DRAFT]
274  Rotate onion keys less frequently [CLOSED]
275  Stop including meaningful "published" time in microdescriptor consensus [OPEN]
276  Report bandwidth with lower granularity in consensus documents [OPEN]
277  Detect multiple relay instances running with same ID [OPEN]
278  Directory Compression Scheme Negotiation [CLOSED]
279  A Name System API for Tor Onion Services [NEEDS-REVISION]
280  Privacy-Preserving Statistics with Privcount in Tor [SUPERSEDED]
281  Downloading microdescriptors in bulk [RESERVE]
282  Remove "Named" and "Unnamed" handling from consensus voting [ACCEPTED]
283  Move IPv6 ORPorts from microdescriptors to the microdesc consensus [CLOSED]
284  Hidden Service v3 Control Port [CLOSED]
285  Directory documents should be standardized as UTF-8 [OPEN]
286  Controller APIs for hibernation access on mobile [REJECTED]
287  Reduce circuit lifetime without overloading the network [OPEN]
288  Privacy-Preserving Statistics with Privcount in Tor (Shamir version) [ACCEPTED]
289  Authenticating sendme cells to mitigate bandwidth attacks [CLOSED]
290  Continuously update consensus methods [META]
291  The move to two guard nodes [NEEDS-REVISION]
292  Mesh-based vanguards [ACCEPTED]
293  Other ways for relays to know when to publish [CLOSED]
294  TLS 1.3 Migration [DRAFT]
295  Using ADL for relay cryptography (solving the crypto-tagging attack) [OPEN]
296  Have Directory Authorities expose raw bandwidth list files [OPEN]
297  Relaxing the protover-based shutdown rules [CLOSED]
298  Putting family lines in canonical form [CLOSED]
299  Preferring IPv4 or IPv6 based on IP Version Failure Count [OPEN]
300  Walking Onions: Scaling and Saving Bandwidth [DRAFT]
301  Don't include package fingerprints in consensus documents [ACCEPTED]
302  Hiding onion service clients using padding [ACCEPTED]
303  When and how to remove support for protocol versions [DRAFT]
304  Extending SOCKS5 Onion Service Error Codes [ACCEPTED]
305  ESTABLISH_INTRO Cell DoS Defense Extension [DRAFT]
306  A Tor Implementation of IPv6 Happy Eyeballs [OPEN]
307  Onion Balance Support for Onion Service v3 [DRAFT]
308  Counter Galois Onion: A New Proposal for Forward-Secure Relay Cryptography [DRAFT]


Proposals by status:

 DRAFT:
   240  Early signing key revocation for directory authorities
   273  Exit relay pinning for web services [for n/a]
   294  TLS 1.3 Migration
   300  Walking Onions: Scaling and Saving Bandwidth
   303  When and how to remove support for protocol versions
   305  ESTABLISH_INTRO Cell DoS Defense Extension
   307  Onion Balance Support for Onion Service v3
   308  Counter Galois Onion: A New Proposal for Forward-Secure Relay Cryptography
 NEEDS-REVISION:
   212  Increase Acceptable Consensus Age [for 0.2.4.x+]
   219  Support for full DNS and DNSSEC resolution in Tor [for 0.2.5.x]
   245  Deprecating and removing the TAP circuit extension protocol
   248  Remove all RSA identity keys
   254  Padding Negotiation
   269  Transitionally secure hybrid handshakes
   279  A Name System API for Tor Onion Services
   291  The move to two guard nodes
 OPEN:
   201  Make bridges report statistics on daily v3 network status requests [for 0.2.4.x]
   239  Consensus Hash Chaining
   262  Re-keying live circuits with new cryptographic material
   267  Tor Consensus Transparency
   275  Stop including meaningful "published" time in microdescriptor consensus [for 0.3.1.x-alpha]
   276  Report bandwidth with lower granularity in consensus documents [for 0.3.1.x-alpha]
   277  Detect multiple relay instances running with same ID [for 0.3.??]
   285  Directory documents should be standardized as UTF-8
   287  Reduce circuit lifetime without overloading the network
   295  Using ADL for relay cryptography (solving the crypto-tagging attack)
   296  Have Directory Authorities expose raw bandwidth list files
   299  Preferring IPv4 or IPv6 based on IP Version Failure Count
   306  A Tor Implementation of IPv6 Happy Eyeballs
 ACCEPTED:
   188  Bridge Guards and other anti-enumeration defenses
   249  Allow CREATE cells with >505 bytes of handshake data
   265  Load Balancing with Overhead Parameters [for 0.2.9.x]
   282  Remove "Named" and "Unnamed" handling from consensus voting [for 0.3.3.x]
   288  Privacy-Preserving Statistics with Privcount in Tor (Shamir version)
   292  Mesh-based vanguards
   301  Don't include package fingerprints in consensus documents
   302  Hiding onion service clients using padding
   304  Extending SOCKS5 Onion Service Error Codes
 META:
   000  Index of Tor Proposals
   001  The Tor Proposal Process
   098  Proposals that should be written
   099  Miscellaneous proposals
   202  Two improved relay encryption protocols for Tor cells
   257  Refactoring authorities and making them more isolated from the net
   290  Continuously update consensus methods
 FINISHED:
   160  Authorities vote for bandwidth offsets in consensus [for 0.2.1.x]
   196  Extended ORPort and TransportControlPort [in 0.2.5.2-alpha]
   217  Tor Extended ORPort Authentication [for 0.2.5.x]
   232  Pluggable Transport through SOCKS proxy [in 0.2.6]
   260  Rendezvous Single Onion Services [in 0.2.9.3-alpha]
 CLOSED:
   101  Voting on the Tor Directory System [in 0.2.0.x]
   102  Dropping "opt" from the directory format [in 0.2.0.x]
   103  Splitting identity key from regularly used signing key [in 0.2.0.x]
   104  Long and Short Router Descriptors [in 0.2.0.x]
   105  Version negotiation for the Tor protocol [in 0.2.0.x]
   106  Checking fewer things during TLS handshakes [in 0.2.0.x]
   107  Uptime Sanity Checking [in 0.2.0.x]
   108  Base "Stable" Flag on Mean Time Between Failures [in 0.2.0.x]
   109  No more than one server per IP address [in 0.2.0.x]
   110  Avoiding infinite length circuits [for 0.2.3.x] [in 0.2.1.3-alpha, 0.2.3.11-alpha]
   111  Prioritizing local traffic over relayed traffic [in 0.2.0.x]
   114  Distributed Storage for Tor Hidden Service Descriptors [in 0.2.0.x]
   117  IPv6 exits [for 0.2.4.x] [in 0.2.4.7-alpha]
   119  New PROTOCOLINFO command for controllers [in 0.2.0.x]
   121  Hidden Service Authentication [in 0.2.1.x]
   122  Network status entries need a new Unnamed flag [in 0.2.0.x]
   123  Naming authorities automatically create bindings [in 0.2.0.x]
   125  Behavior for bridge users, bridge relays, and bridge authorities [in 0.2.0.x]
   126  Getting GeoIP data and publishing usage summaries [in 0.2.0.x]
   129  Block Insecure Protocols by Default [in 0.2.0.x]
   130  Version 2 Tor connection protocol [in 0.2.0.x]
   135  Simplify Configuration of Private Tor Networks [for 0.2.1.x] [in 0.2.1.2-alpha]
   136  Mass authority migration with legacy keys [in 0.2.0.x]
   137  Keep controllers informed as Tor bootstraps [in 0.2.1.x]
   138  Remove routers that are not Running from consensus documents [in 0.2.1.2-alpha]
   139  Download consensus documents only when it will be trusted [in 0.2.1.x]
   140  Provide diffs between consensuses [in 0.3.1.1-alpha]
   148  Stream end reasons from the client side should be uniform [in 0.2.1.9-alpha]
   150  Exclude Exit Nodes from a circuit [in 0.2.1.3-alpha]
   151  Improving Tor Path Selection [in 0.2.2.2-alpha]
   152  Optionally allow exit from single-hop circuits [in 0.2.1.6-alpha]
   155  Four Improvements of Hidden Service Performance [in 0.2.1.x]
   157  Make certificate downloads specific [for 0.2.4.x]
   158  Clients download consensus + microdescriptors [in 0.2.3.1-alpha]
   161  Computing Bandwidth Adjustments [for 0.2.1.x]
   162  Publish the consensus in multiple flavors [in 0.2.3.1-alpha]
   166  Including Network Statistics in Extra-Info Documents [for 0.2.2]
   167  Vote on network parameters in consensus [in 0.2.2]
   171  Separate streams across circuits by connection metadata [in 0.2.3.3-alpha]
   174  Optimistic Data for Tor: Server Side [in 0.2.3.1-alpha]
   176  Proposed version-3 link handshake for Tor [for 0.2.3]
   178  Require majority of authorities to vote for consensus parameters [in 0.2.3.9-alpha]
   179  TLS certificate and parameter normalization [for 0.2.3.x]
   180  Pluggable transports for circumvention [in 0.2.3.x]
   181  Optimistic Data for Tor: Client Side [in 0.2.3.3-alpha]
   183  Refill Intervals [in 0.2.3.5-alpha]
   184  Miscellaneous changes for a v3 Tor link protocol [for 0.2.3.x]
   186  Multiple addresses for one OR or bridge [for 0.2.4.x+]
   187  Reserve a cell type to allow client authorization [for 0.2.3.x]
   193  Safe cookie authentication for Tor controllers
   198  Restore semantics of TLS ClientHello [for 0.2.4.x]
   200  Adding new, extensible CREATE, EXTEND, and related cells [in 0.2.4.8-alpha]
   204  Subdomain support for Hidden Service addresses
   205  Remove global client-side DNS caching [in 0.2.4.7-alpha.]
   206  Preconfigured directory sources for bootstrapping [in 0.2.4.7-alpha]
   207  Directory guards [for 0.2.4.x]
   208  IPv6 Exits Redux [for 0.2.4.x] [in 0.2.4.7-alpha]
   214  Allow 4-byte circuit IDs in a new link protocol [in 0.2.4.11-alpha]
   215  Let the minimum consensus method change with time [in 0.2.6.1-alpha]
   216  Improved circuit-creation key exchange [in 0.2.4.8-alpha]
   218  Controller events to better understand connection/circuit usage [in 0.2.5.2-alpha]
   220  Migrate server identity keys to Ed25519 [in 0.3.0.1-alpha]
   221  Stop using CREATE_FAST [for 0.2.5.x]
   222  Stop sending client timestamps [in 0.2.4.18]
   224  Next-Generation Hidden Services in Tor [in 0.3.2.1-alpha]
   227  Include package fingerprints in consensus documents [in 0.2.6.3-alpha]
   228  Cross-certifying identity keys with onion keys
   235  Stop assigning (and eventually supporting) the Named flag [in 0.2.6, 0.2.7]
   236  The move to a single guard node
   237  All relays are directory servers [for 0.2.7.x]
   238  Better hidden service stats from Tor relays
   243  Give out HSDir flag only to relays with Stable flag
   244  Use RFC5705 Key Exporting in our AUTHENTICATE calls [in 0.3.0.1-alpha]
   250  Random Number Generation During Tor Voting
   251  Padding for netflow record resolution reduction [in 0.3.1.1-alpha]
   264  Putting version numbers on the Tor subprotocols [in 0.2.9.4-alpha]
   271  Another algorithm for guard selection [in 0.3.0.1-alpha]
   272  Listed routers should be Valid, Running, and treated as such [in 0.2.9.3-alpha, 0.2.9.4-alpha]
   274  Rotate onion keys less frequently [in 0.3.1.1-alpha]
   278  Directory Compression Scheme Negotiation [in 0.3.1.1-alpha]
   283  Move IPv6 ORPorts from microdescriptors to the microdesc consensus [for 0.3.3.x] [in 0.3.3.1-alpha]
   284  Hidden Service v3 Control Port
   289  Authenticating sendme cells to mitigate bandwidth attacks [in 0.4.1.1-alpha]
   293  Other ways for relays to know when to publish [for 0.3.5] [in 0.4.0.1-alpha]
   297  Relaxing the protover-based shutdown rules [for 0.3.5.x] [in 0.4.0.x]
   298  Putting family lines in canonical form [for 0.3.6.x] [in 0.4.0.1-alpha]
 SUPERSEDED:
   112  Bring Back Pathlen Coin Weight
   113  Simplifying directory authority administration
   118  Advertising multiple ORPorts at once
   124  Blocking resistant TLS certificate usage
   143  Improvements of Distributed Storage for Tor Hidden Service Descriptors
   145  Separate "suitable as a guard" from "suitable as a new guard"
   146  Add new flag to reflect long-term stability
   149  Using data from NETINFO cells
   153  Automatic software update protocol
   154  Automatic Software Update Protocol
   156  Tracking blocked ports on the client side
   163  Detecting whether a connection comes from a client
   169  Eliminate TLS renegotiation for the Tor connection handshake
   170  Configuration options regarding circuit building
   185  Directory caches without DirPort
   194  Mnemonic .onion URLs
   210  Faster Headless Consensus Bootstrapping
   225  Strawman proposal: commit-and-reveal shared rng
   247  Defending Against Guard Discovery Attacks using Vanguards
   252  Single Onion Services
   266  Removing current obsolete clients from the Tor network
   280  Privacy-Preserving Statistics with Privcount in Tor
 DEAD:
   100  Tor Unreliable Datagram Extension Proposal
   115  Two Hop Paths
   116  Two hop paths from entry guards
   120  Shutdown descriptors when Tor servers stop
   128  Families of private bridges
   142  Combine Introduction and Rendezvous Points
   195  TLS certificate normalization for Tor 0.2.4.x
   213  Remove stream-level sendmes from the design
   253  Out of Band Circuit HMACs
   258  Denial-of-service resistance for directory authorities
 REJECTED:
   134  More robust consensus voting with diverse authority sets
   147  Eliminate the need for v2 directories in generating v3 directories [for 0.2.4.x]
   165  Easy migration for voting authority sets
   168  Reduce default circuit window
   175  Automatically promoting Tor clients to nodes
   197  Message-based Inter-Controller IPC Channel
   229  Further SOCKS5 extensions
   233  Making Tor2Web mode faster
   234  Adding remittance field to directory specification
   241  Resisting guard-turnover attacks
   246  Merging Hidden Service Directories and Introduction Points
   286  Controller APIs for hibernation access on mobile
 OBSOLETE:
   127  Relaying dirport requests to Tor download site / website
   131  Help users to verify they are using Tor
   132  A Tor Web Service For Verifying Correct Browser Configuration
   141  Download server descriptors on demand
   144  Increase the diversity of circuits by detecting nodes belonging the same provider
   164  Reporting the status of server votes
   173  GETINFO Option Expansion
   182  Credit Bucket
   189  AUTHORIZE and AUTHORIZED cells
   190  Bridge Client Authorization Based on a Shared Secret
   191  Bridge Detection Resistance against MITM-capable Adversaries
   192  Automatically retrieve and store information about bridges [for 0.2.[45].x]
   199  Integration of BridgeFinder and BridgeFinderHelper
   203  Avoiding censorship by impersonating an HTTPS server
   209  Tuning the Parameters for the Path Bias Defense [for 0.2.4.x+]
   230  How to change RSA1024 relay identity keys [for 0.2.?]
   231  Migrating authority RSA1024 identity keys [for 0.2.?]
   259  New Guard Selection Behaviour
   261  AEZ for relay cryptography
   263  Request to change key exchange protocol for handshake v1.2
   268  New Guard Selection Behaviour
   270  RebelAlliance: A Post-Quantum Secure Hybrid Handshake Based on NewHope
 RESERVE:
   133  Incorporate Unreachable ORs into the Tor Network
   172  GETINFO controller option for circuit information
   177  Abstaining from votes on individual flags [for 0.2.4.x]
   211  Internal Mapaddress for Tor Configuration Testing [for 0.2.4.x+]
   223  Ace: Improved circuit-creation key exchange
   226  "Scalability and Stability Improvements to BridgeDB: Switching to a Distributed Database System and RDBMS"
   242  Better performance and usability for the MyFamily option
   255  Controller features to allow for load-balancing hidden services
   256  Key revocation for relays and authorities
   281  Downloading microdescriptors in bulk
 INFORMATIONAL:
   159  Exit Scanning
